Cabling arrangement for telephone systems



May 20, 1930. M. J. ARNDT 1,758,919

CABLINQI'ARRANGEMENT FOR TELEPHONE SYSTEMS Fiied April e, 1927 2sheets-sheet 1 REG. SUBS MULTlPLE JACKS r/// 'y /A l www ATTO RN May 20,1930. M. J. ARNDT CABLING ARRANGEMENT FOR TELEPHONE SYSTEMS FIGA M ELVINJ. AQNDT' Patented May `20, 1930 UNITED s'rarlfzsA PATENT ori-lcs 7MELVIN J. ARNDT, or ROCHESTER, NEW YORK., AssIGNoR To THE STRMBERG CARL-SON TELEPHONE MANUFACTURING COMPANY, OF ROCHESTER, NEW YORK, A COR-PORATION or NEW YORK CABLING ARRANGEMENT FOR TELEPHONE Application ledApril 6;

This invention relates to manual telephone systems and more particularlyto the arrangement and cabling of a telephone switch-` board and itsassociated terminal equipment.

In certain of the improved types of switchboards now in use it iscustomary for each subscribers line served therein to terminate inananswering jack at an operators position and in addition it alsolappears in an ancillary jack at another opera-tors position, while theupper portion `of the switchboard is provided with the well-known multi-'ple jacks through, which subscribers lines tically impossible todistribute theload uniformly to all operators and since the cablingarrangement ust referred to does not lend itself to rearrangement, ifthe answering equipment must be rearranged,it is necessary either tosplice out the present cables or furnish new cables both of'whichmake-shifts tend to complicate the cable run and may entirely block thecable run from future growth.

A further disadvantage of the present arrangement is the fire hazardsince with the cable run extending the whole length of the switchboard afire starting at an answering jack in the board usually burns into thecable run lthereby disablingv more or less of the switchboar The presentinvention permits wide flexibility of the answering equipment becausethe answeringjacks maybe multipled iii-any desired manner at the time ofinstallation and may be easily changedat somelater timeto meet changingtraiiic requirements. In addition the answering jacks, lamps and cablescan be moved from one partsof vthe switch- 1927. Serial N0. 181,399.

board to another without the necessity of splicing-the old cables orfurnishing new ones, and furthermorethe method of cabling eliminates theanswering jack cable run entirely from the switchboard thereby leavingthe rear of the board much more accessible.

The main feature of the invention by which the above advantages areobtained consists in mounting the intermediate 'distributing frameparallel to the switchboard with one vertical of the frame aligned witheach panelof the switchboard and by employing short cablesbetweenthepanels of the board and the verticals of the intermediatedistributing frame.

A further feature of the inventionl consists in mounting the switchboarddirectly above the intermediate distributing' frame with the verticaleof the frame spaced on the same centers as the jack stiles in theswitchboard.

An additional feature of the invention resides in the wiring connectionsand cables between the multiple terminals, the answer-` ing aclsy andtherelay rack.

, In the drawings Figs. liand Qrepresent one embodiment of the inventionin which Fig. 1 shows a verticalsection through' two floors of atelephone building with the intermediate distributing framev on onefloor and the switchboardV placed on the floor directly above. Y Fig.`2isa section through the telephone buildingfat right angles to that ofFig. 1 and showsv how the switchboard is positioned directlyV above theintermediate distributing frame. Fig. 3 shows a modified form of, theinvention representing an end view of an intermediate distributing frameand the switchboard which are mounted fon the same floor in parallelrelation. Figi-l Y is a wiring'diagram indicating the method ofinterconnectingthe different pieces of equipment by umpers and cables.

For a better understanding of the inveii-A tion reference ismade toFigs, 1 and 2 in which 10 represents one Hoor of a-te'lephone exchangeand 11 designates the floor' directly above. On this upper floor thereis positioned a vswitchboard generally. designated 12 and which consistsof a plurality lof sections such as 18 only four of which are shown.

PRIM. ANS. while in the space in the-panel` directly above the primaryand. ancillary answering j acksthere are. mounted the usual multiplejacks through which subscribers" lines may be called. It will be notedthat in the squares representingpthe bloclisotL one hundred primaryanswering jacks and the ancillary answering jacks, there. appear small rnumerals such as 0, 1, ,2, 3, etc. which indicatethe hundredsdesignation of; tlre lines ternjiinatin-g.;V in these blocks. ForAexampleV the lines appearingin the 07' block have the designation of 0to199inclusive.

Onthelowerifoor vdesignated 10 there is erected an intermediatedistributing frameA built'withits verticalsA 16 spaced on thesamecenters as the aclr stiles 15` ofthe switchboard.` Thus there isprovided one I verticalof the frame for ea ch panel of the switchboardthatis Aused for localteleplrone lines. The cables 30 from-theanswering'j acks and lamps of the, switchboard 12-are brought downthroughl the floor V11 th-rough pipes 17 as shown, or the iioor can beconstructedwith a slotA therein extending theV entire Ylengthl oftheswitchboard.

Theseanswering cables are made sets ot' ten foreach panel andy sinceAalljpanels are alike as toA form and over-allfleng-tha it is onlynecessary to design the Iten cables for the-first panel Asince the othersets of ten Cables for the remaining panels lare `identicalwith thefirst. engineering of anninstallationv this arrangementreducesthechances ot error-inl laying' out the cablingsystem. Furthermore-ifitis desirable to move-the equipment-oi any-panelV or panels it-is onlynecessary tol moveJ the set-oi? ten cables associateddwith. each paneland this can ben done -without disturbing the cablingV of the remaining'panels.

In-ithe arrangement shown in Figs. 1 and 2 theintermediateframe is builtwith two-hundred Vterminals Von the-answeringjack side of the` vertical,and theupper hundred of these terminalsthroughout tliefr'ame areconnected with the primary answering jacks -ot each panelofth'eswitehboard while thelower hundred terminals 19 of theyertical 'areconnected-to-the ancillary answering-j acks ofthe corresponding panel:Bywrete'rring tothe primary. and' ancillaryanswering j-ackl arrangementshown in Fig.- lit will beA noted that .while the primary answering`jacksf are arranged-in' numericalorder they ancillary* answering jacksare transposedor staggered in.k suchla manner that whileutlie lines inthe 6th', 7th, 8th,9th', 10th.-andllththundreds groups aretgivenipreference by. being. `con- In addition to-simplifying the nected to theprimary answering jacks in the Llth and 5th divisions of sections 2 and3, these lines having a secondary preference by being connected to theancillary answering jacks in the second and third divisions ot' sectionsl1 and 2. The multipling andtranspositionof these lines just referred tomay be effected in rthe intermediate.distributing. frame as shown by theparallellbraces and dottedconnecting lines in Fig, lirepresenting jumperwires. The regular subscribers mul- `tiple jacksappearing in the upperportion of the switchboard are connected in the usual manner byacva-bleextending throughout the length of the board and indicated indotted lines at 20. This cable is supported over a cable rack such as 21and extends to one end of the intermediate distributing frame whereit issupported on the cross-irons such as 22 of the fivel upper levels on thehorizontal side of the frame which carries termina-l strips 23 vforterminating the-multiple cable. It willbe noted that thereA are noterminals placed inthe lower portion of this side of the frame and itwill beA understood that'the multiple terminals are connected orjumpered to the` primary answering jack terminalslS on the opposite`side of'the frame.

In the modification shown in Fig. 3 the switchboard 12 and theintermediate distributing fra-me generally designated 9 are inountedon'the same looror-level. As .in the arrangement ofi Figs. 1` and'2' theswitchboard and distributing :trame extend in parallell relationwiththeverticals of the distributing` :tramel positioned directly back ot'thecorresponding jack stilesofthe switchboard.` Otherwisethewarrangement of the equipment is the same-as-that shown in Figs. 1and 2 and the4 cabling is also thel same except vinstead of beingdropped vertically from the-switchboard to theframe itmust be mounted asshown in dotted lines at v23.

The wiring between the different pieces ot' equipmentin the twomodifications is the same as shown in Fig. @wherein it is representedthat cables 24 connect answering terminal strips 18 in the intermediatedistributingrame to theli'nerelay'rack (not shown) but the connectionisindicated tothe line relays 25. The line relay rack is then connected tothe main distributing frame not` shown in Figs. 2 and Sbut representedat 26 in Fig. et. Cables designated 30`connect the primary answeringjacks and the ancillary answering jacks to the terminali-:18 and 19 ofthe intermediate distributing frames-while jump-l ers 27' connectthe`primary answering jacks to. corresponding terminals of the multiplejacks. Otherjumpers suchl as 28; serve to cross-connect the. primaryanswering jack terminals and the ancillary answering jack terminals atthe intermediate.y distributing :trame tofpermit staggering of theancillary answering jacks.

It will thus be seen that the present invention provides an improvedvarrangement of telephone exchange equipment and the method ofinterconnecting it which simpliiies installation and permits easyrearrange- -v ment of the equipment to meet changing trafficrequirements.

What I claim, is:

Telephone exchange equipment including a switchboard mounted on onefloor, said switchboard being provided with 'panels7 each panel having aplurality of primary ans-wering jacks and ancillary answering jacks, anintermediate distributing frame on a Second floor directly beneath saidswitchboard and extending in the same direction as said switchboard,said intermediate distributing frame having verticals spaced on the samecenters as the sides of said panels, terminals y on each panel, cablesconnecting the primary answering jacks and ancillary answering jacks toterminals on associated verticals and jumpers Jfor cross-connecting saidterminals whereby the appearances of lines in said ancillary jacks maybe varied by interchanging said jumpers.

In witness whereof, I hereunto subscribe my name this 14th day of MarchA. D. 1927.

MELVIN J. ARNDT.

